feat: clickable WooCommerce product links in mapping UI

Product names in the mapped table are now links that open the WC product
page in a new tab. Added woo_permalink field, stored during fetch,
returned by search endpoint.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

fusion-woo-odoo/fusion_woocommerce/models/woo_product_map.py

@@ -26,6 +26,7 @@ class WooProductMap(models.Model):
         ('external', 'External'),
     ])
     woo_price = fields.Float(string='WC Price', digits='Product Price')
+    woo_permalink = fields.Char(string='WC Product URL')
     woo_parent_id = fields.Integer()
     is_variation = fields.Boolean()
     sync_price = fields.Boolean(default=True)